Pneumatic column



' L. c. BAYLES.

PNEUMATIC COLUMN.

APPLICATION FILED JU'NE22, 1921.

INVEIQTOR Lea/1'5 (513 umns adapted to support a fluid actuatedobjects of the invention are to enable greatly PAENT OFFICE.

LEWIS c. BAYLES, or' msron, PENNSYLVANIA, Assmn'oa 'ro IN'GERSOLL-RAND compan or JERSEY our, new senses, a eoaronarron or NEWJEBSEY.

PNEUMATIC COLUMN.

To all whom it may concern: 7

Be it known that I, LEWIs C. Burns, a citizen of the United States, a resident of Easton, Northampton county, and State of The piston ro Pennsylvania, have invented a certain Pneumatic Column, of which the following is a specification, accompanied by drawings.

This invention relates to pneumatic colpercussive tool in operative position and the increased pressure, in addition to the fluid pressure, to be applied to the column, independently of the fluid pressure and secure a column which is safe and will not fall upon failure of the fluid pressure.

Another object of the invention is to enable auxiliary pressure means to be applied to the column for exerting pressure tending to force the upper rock engaging member outward beyond the position assumed due to the fluid actuating means in the column .casing, so that upon failure of fluid pressure, the auxiliary pressure means prevents the return of the piston rod into the cylinder casing and causes the rock engaging members of the column to continue to exert pressure to maintain the column in position.

Further objects of the invention will hereinafter appear and to all of these ends the invention consists of the apparatus shown in the accompanying drawings, in which- Figure 1 is a side elevation partly in longitudinal section of a column containing the invention,

Fig. 2 is a detail vertical sectional view of the upper portion of the column with the parts in a different position of adjustment from that shown in Fig. 1,

Fig. 3 is an enlarged detail perspective view of the upper portion of the column.

Fig. 4 is a longitudinal sectional elevation of the lower portion of the column on the line 4-4 of Fig. 1 looking in the direction of the arrows, and

Fig. 5 is a detail transverse sectional view taken through the supply valve.

Referring to the drawings, the column comprises a cylinder casing A suitably se- Specification of Letters Patent. Patented Dea 27, 1921 Application filed June 22, 1921. Serial No. 479,687. 1'

rod F extending outwardly beyond the end of the cyllnder casing A and provided with a rock engagin member G at its outer end. F passes loosely through a supporting member H preferably in the form of a sleeve adjustable longitudinally 1n the cylinder casing and extending beyond the end of the casing. This sleeve H may conveniently take the form of a jack screw having screw threaded engagement with a head J suitably held within the end of the cylinder casing as by-means of the clamping band K and bolt The jack screw H is provided with adjusting means in the form of a solid head or block 0 having diagonal holes or openings P for the insertion of a bar Q to enable the jack screw to be rotated within the head J and adjusted longitudinally relatrvely to the cylinder casing A for the purpose of preventing the return of the piston rod F into the cylinder casing upon failure of fluid pressure.

An auxiliary pressure device preferably in the form of a coiled spring R is interposed between the sleeve head 0 and the rock engaging member G of the piston rod for exerting pressure tending to force the rock engaging member G outwardly beyond the posltion assumed, due to the fluid actuated pressure in the cylinder casing, so, that upon failure of fluid pressure the spring, as indicated in Fig. 2, prevents the return of the piston rod into the cylinder casing and causes the rockengaging members to continue to exert pressure to maintain the column in position. In Fig. 2 the jack screw H has been screwed up to such a point that the spring R has been placed under considerable tension. 'This spring R may be of great strength and capable of exerting a pressure of many tons.

Any suitable or usual clamp S may be provided on the cylinder casing A for holdlng a percussive or other tool. The supply and exhaust of fluid pressure to and from the cylinder may be controlled by a suitable throttle valve T mounted in the base B and provided with a handle U which may be manipulated by either the hand or foot of the operator. Fluid pressure is supplied at the inlet pipe V and passes through the valve and out through the port W in the valve and the port X in the base B to the cylinder casing, when the valve is turned from the position indicated in Fig. 5 in the direction of the arrow. Further rotation of the valve in the same direction opens the Suppl to the pipe Y adapted to be connecte to the su ply line of the percussive tool. Upon turnlng the valve '11 backwardly the supply to the percussive tool 15 first cut ofl' while the supply to the column .1s continued. When the valve is turned to the osition indicated in Fi 5 the column exhausts through the port through the longitudinal port Z in the periphery of the valve I I claim:

1. A column adapted to support a fluid actuated percussive tool in OPQI'MJIVG' position, comprisin a rock engaging member at one end. ada ted to engage at a plurallty of points, a c inder casing nonrotatably connected to t c said rock engaglngmember', a sleeve adjustable:longitudinally 1n the cylinder casing and extending beyond the end of the said casing, a fluid actuated piston in the cylinder casing, a piston rod connected to said piston and extending loosely through the said sleeve beyond the end of the sleeve, and a rock engaging member at the end of the piston rod, whereby the said sleeve may be adjusted longitudinally to prevent the return of the piston rod into the cylinder casin upon failure of fluid pressure.

2. i column adapted to support a fluid actuated percussive tqol in operative position, comprising a rock engaging member at one end adapted to engage at a plurality of points, a cylinder casing non-rotatably connected to the said rock engaging memher, a sleeve adjustable longitudinally in the cyhnder casing and extending beyond the end of the said casing, a fluid actuated piston in the cylinder casing, a piston rod connected to said piston and extending loosely through the said sleeve beyond the end of the sleeve, a rock engaging member at the end of the piston rod, and auxiliary pressure means interposed between the said sleeve and the upper rock engaging member for exerting pressure tending-t0 force the said rock engaging member outward beyond the position assumed due to the fluid actuating pressure in the cylinder casing, whereby upon failure of fluid pressure the said auxiliary pressure means prevents the return of the piston rod into the cylinder casing and causes the rock'engaging members I to continue to exert pressure to maintain the column in position.

3. A column adapted to support a fluid Y actuated percussive tool in operative position, comprising a rock engaging member at one end adapted to engage at a plurality of points, a cylinder casing non-rotatably connected to the said-rock en aging member, a sleeve adjustable longitudinally in the cylinder cas ng and extending beyond the end neonates fluid actuating pressure in the cylinder casing, whereby upon failure of fluid pressure the said spring prevents the return of the piston rod into the. cylinder casing and vcauses the rock engaging members to con tinue to exert pressure to maintain the column in position.

4. A column adapted to support a fluid. actuated percussive tool in operative position, comprising a rock engaging member at one end adapted to engage at a plurality of points, a cylinder casing non-rotatably con-v nected to the said rock engaging member, a fluid actuated piston in the cylinder casing a piston rod connected to said piston and extending beyond the end of the cylinder casing, a rock engaging member at the end of the piston rod, and a jack screw loosely surrounding the piston rod and in threaded engagement with a portion of the cylinder casing, whereby the jack screw may be adjusted to prevent the return of the piston rod into the cylinder casing upon failure of fluid pressure. I

5. A column adapted to support a fluid actuated percussive tool in operative position, comprising a rock engaging member at one end adapted to engage at a plurality of points, a cylinder casing non-rotatably connected to the said rock engaging member,-

a fluid actuated piston in the. cylinder casing, a piston rod connected to said piston and extending beyond the end of the cylinder casing, a rock engaging member at the end. of the piston rod, a jack screw loosely surrounding the piston rod and in threaded.

engagement with a portion of the cylinder casing, and auxiliary pressure means interposed between the said jack screw and the upper rock engaging member for exerting pressure tending to force the said rock engaging member outward beyond the position assumed due to the fluid actuating pressure in the cylinder casing, whereby upon failure of fluid pressure the said auxiliary pressure means prevents the return of the piston rod into the cylinder casing and causes the rock engaging member to continue to exert pressure to maintain the column in position. 1

6. A column adapted to support a fluid actuated percussive .tool in operative position, comprising a rock engaging member at one end adapted to engage at a plurality of,

points, a cylinder casing non-rotatably conmenses nected to the said rock engaging member, a fluid actuated piston in the cylinder casing, a piston rod connected to said piston and extending beyond the end of the cylinder casing, a rock engaging member at the end of the piston rod, a jack screw loosely surrounding the piston rod and in threaded engagement with a portion "of the cylinder casing, and a spring interposed between the said ack screw and the upper rock engaging member tending to force said rock engaging member outward beyond the position assumed due to the fluid actuating pressure in the cylinder casing, whereby upon failure of fluid pressure the said spring prevents the return of the piston rod into the cylinder casing and causes the rock engaging member to continue to exert pressure to maintain the column in position.

In testimony whereof I have signed this specification.

LEWIS C. BAYLES. 

